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        Triconex 8312
        Triconex 8312
        Triconex 8312
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        Triconex 8312
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        8312

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        The 8312 is the core power supply unit of the Tricon control system rack, responsible for converting external 230 VAC AC power into low-voltage DC power required by the system's internal main processor and I/O modules.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
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        Technical specifications for 8312

        • Manufacturer:
          Invensys
        • Part Number:
          8312
        • Product Family:
          Triconex
        • Product Type:
          Power Supply Module
        • Nominal Voltage:
          230 VAC
        • Input VAC (47-63 Hz):
          185–285 VAC
        • Input VDC:
          Not applicable (AC only)
        • Fuse Rating and Type:
          2.5 amps, time-delay
        • Output Voltage:
          6.5 VDC ±1%
        • Output Power:
          175 watts at 140°F (60°C)
        • Output Current:
          27 amps maximum at 140°F (60°C)
        • Output Hold Time:
          20 ms minimum (nominal to 0 volts)
        • Input Power Required:
          240 watts minimum per module
        • Alarm Contact Rating:
          120 VAC @ 1 amp
        • Isolation:
          >1,000 VAC or 1,500 VDC, Input to Output
        • Weight:
          3.04 kg
        • Estimated shipping dimensions:
          6.1x40.8x17.6cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Performance & Efficiency Application Scenarios

        Features:

        • Delivers 27 amps maximum output current at 6.5 VDC ±1% with 175 watts output power at 140°F (60°C) ambient, requiring minimum 240W input power per module.
        • Features five diagnostic LEDs (PASS, FAULT, ALARM, TEMP, BAT LOW) plus alarm contacts (NO, NC, common) that actuate for power loss, module failure, configuration conflicts, and over-temperature.
        • Chassis holds two power modules with either capable of full-load operation.
        The 8312 is designed to provide robust, reliable DC power to the Tricon chassis under demanding conditions. It converts 230 VAC input (range 185–285 VAC) to a tightly regulated 6.5 VDC output with only ±1% variation across all operating conditions. The module delivers 27 amps maximum output current, translating to 175 watts of output power at 140°F (60°C) ambient temperature. Input power requirement is 240 watts minimum per power module, with a 2.5 amp time-delay fuse for protection. Output hold time is 20 ms minimum from nominal to 0 volts, ensuring stable operation during momentary line disturbances.

        The 8312 provides extensive diagnostic visibility to help maintenance teams quickly identify power-related issues. Five front-panel LEDs offer immediate status indication: PASS (green, normal operation), FAULT (red, internal module failure), ALARM (yellow, warning condition), TEMP (yellow, over-temperature), and BAT LOW (yellow, low battery warning). An internal over-temperature sensor trips when temperature exceeds 181°F (83°C), typically at ambient of 140°F (60°C) or higher.

        The 8312 is part of a redundant power architecture where each Tricon chassis accommodates two power modules. Either module alone is fully capable of running the entire Tricon system at full load and rated temperature, providing true 1+1 redundancy. This design eliminates the power supply as a single point of failure in safety-critical applications. The 8312 supports online replacement (hot-swapping), allowing a failed module to be removed and replaced without powering down the system or interrupting the safety function of the controller.

        The 8312 TRICONEX Power Supply Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL)by the manufacturer (OEM).

        TRICONEX 8312 Power Supply Module Manuals, Datasheets,Drivers,Link Important Notice:Other accessories,manuals,cables,calibration data,software,etc.are not included with this equipment unless listed in the above stock item description.All prices are shown in USD.
        TRICONEX 8312 Power Supply Module Specs

        General

        • Manufacturer TRICONEX
        • Model 8312
        • Condition New Original ready stock
        • Product Family 3006,3664,3805EN
        Important Notice:Other accessories,manuals,cables,calibration data,software,etc.are not included with this equipment unless listed in the above stock item description.All prices are shown in USD.
        • Upstream & Downstream Oil and Gas: Installed on offshore drilling platforms, Floating Production Storage and Offloading (FPSO) units, oil refineries, and large-scale LNG receiving terminals.
        • Petrochemical & Chemical Processing: Deployed in ethylene crackers, high-pressure reactor units, and hydrocracking facilities to sustain Emergency Shutdown (ESD) systems.
        • Nuclear & Conventional Power Generation: Acts as the robust power pillar for Reactor Protection Systems (RPS), Engineered Safety Features Actuation Systems (ESFAS), and critical gas/steam turbine trip systems.
        • Critical Infrastructure: Supplies power to safety interlocking networks in transcontinental pipelines and subsea pumping stations.
        • Dual Power Redundancy:Every Tricon chassis typically houses two 8312 modules (left and right position) working in a parallel, load-sharing configuration. If one module experiences a component failure or losing its AC feed, the remaining module instantly assumes 100% of the chassis load within microseconds without causing any voltage drops or system resets.
        • Input Voltage Range: Supports a broad AC spectrum from 185 to 285 VAC, mitigating severe grid voltage sags or swells.
        • Hold-Up Time: Features a high-capacity internal capacitor bank. During a temporary grid blackout (voltage blink), the module maintains a steady DC output for tens of milliseconds, giving external Uninterruptible Power Supplies (UPS) enough time to switch lines.
        • Online Hot-Swapping Capability:The module is fully hot-swappable. Maintenance personnel can remove a degraded power supply and slide in a new one while the system is active and online, completely eliminating the need to take the plant down for maintenance.
        • The Tricon controller, communication links, and field digital outputs continue running smoothly. This configuration protects the plant from a costly false shutdown, saving the operator millions in lost production time.
        • After years of continuous service, the Tricon system flags a diagnostic alarm indicating that the left 8312 module's internal capacitors are aging, causing a slight drift in internal voltage (the front panel FAULT red LED turns on).
        • In a nuclear power facility, an emergency reactor trip must execute even during intense seismic activity or severe electromagnetic interference (EMI). The 8312's heavy internal shielding and built-in surge isolation networks prevent electrical noise from penetrating the backplane, ensuring the main processors successfully deliver the safety rod drop command without interruption.
        Description
        The 8312 is a power module designed for Tricon main, expansion, and RXM chassis systems, providing reliable DC power conversion from 230 VAC line voltage. Each chassis accommodates two power modules, with either one fully capable of running the Tricon at full load and rated temperature. 

        The 8312 features a comprehensive set of diagnostic indicators including PASS, FAULT, ALARM, TEMP, and BAT LOW LEDs. Input termination accepts three 12-gauge wires (neutral, hot, and protective earth) protected by a safety cover. 

        Alarm contacts on the 8312 are normally open, normally closed, and common, with each contact supporting 120 VAC at 1 amp. These contacts are actuated under conditions including module missing, hardware/software configuration conflict, module failure, primary power failure, or low battery/over-temperature warnings. 

        Alternative Names
        3006 3664 3805EN 8300A 3601E 3636R 3008N 3625N
        Technical notes
        The 8312 is a 230VAC input power module for Tricon main, expansion, and RXM chassis. It converts line power to 6.5 VDC ±1% output, delivering 27A max (175W) at 60°C. Features include over-temperature protection (83°C trip), alarm contacts (120VAC @ 1A), and diagnostic LEDs (PASS, FAULT, ALARM, TEMP, BAT LOW).
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the core function of the 8312, and what is its key timing specification?
        The 8312 is a 1-to-12 LVCMOS/LVTTL fanout buffer designed to distribute a clock signal with high fidelity. Its key timing specification is a maximum output skew (tsk(o)) of 150 ps, which ensures that all twelve outputs are closely aligned in time, critical for synchronous system operation.
        What voltage configurations does the 8312 support, and what is the benefit?
        The 8312 supports six distinct supply modes: 3.3V/3.3V, 3.3V/2.5V, 3.3V/1.8V, 2.5V/2.5V, 2.5V/1.8V, and 1.8V/1.8V (core voltage/output voltage). This flexibility allows it to interface directly between different logic voltage domains within a single system, acting as both a buffer and a level translator, which simplifies power architecture design.
        How does the additive phase jitter performance of the 8312 impact high-speed design?
        The additive phase jitter of the 8312, specified to be as low as 0.022 ps RMS (at 100MHz, integrated from 12kHz to 20MHz), quantifies the minimal intrinsic timing noise it adds to the clock signal. Low phase jitter is paramount in high-speed serial links and communication systems to reduce bit-error rates (BER) and maintain signal integrity, making the 8312 suitable for demanding applications.
        What are the roles of the OE and CLK_EN pins, and how should unused I/Os be handled?
        The Output Enable (OE) pin asynchronously places all outputs in a high-impedance state when low. The Clock Enable (CLK_EN) pin synchronously enables (high) or disables (low, outputs held low) the outputs based on the function tables. For unused control pins (OE, CLK_EN), the internal pull-up/pull-down resistors are sufficient, though a 1kΩ external resistor can be added for extra protection. Unused LVCMOS outputs can be left floating with no connection.

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